▎ 摘　　要

The effect of two dimensional graphene nanosheets (2D GNSs) and one dimensional carbon nanotubes (1D CNTs) on the isothermal crystallization of an ethylenevinyl acetate (EVA) copolymer at a high loading (5 wt.%) was studied by in-situ synchrotron wide-angle X-ray diffraction. The morphology observations indicated a homogeneous dispersion of GNSs and CNTs in EVA which formed a constrained environment (3D network or 2D layered structure) for ethylene-vinyl acetate EVA crystallization, respectively. The results of wide-angle X-ray diffraction showed a high weight fraction of nano-fillers slowed the crystallization rate of composites. The crystallization behavior of EVA was confined by 2D planar GNSs more seriously than 1D tubular CNTs owing to a more completed and closed layered GNS network.